Pbecy c



(No Model.)

P. O. OHL.

TELEPHONE CALL.

Patented July 10, 1883.

. N, PETERS. PlMa-Uthagnohee, Walhiagim D. C

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PATENT PERCY O. OHL, OF PLAINFIELD, NEW JERSEY.

. TELEPHONE-CALL.

SPECIFICATION forming part of Letters Patent No, 280,948, dated July 10, .1883.

Application filed October 20, 1882. (No model.)

To all whom it may concern:

Be it known that I, PERCY G. OHL, of Plainfield, in the county of Union and State of New Jersey, have invented an Improve ment in Telephone Call-Signals, of which the following is a specification.

Telephones are often placed in private houses and in offices where the party is frequently absent or out of hearing of the teleie phone-call, and when he returns he has no means of knowing that the call has been rung during his absence.

The first part of my invention relates to an indicator that is so combined with the bell call and hammer that the movement of the bell-hammer armature drops the indicator and denotes that there has been a call on the telephone. In private houses especially, the ringing of the call bell is an annoyance to nervous or sick persons, and the noise is augmented and unnecessary in sending out a call.

The second feature of the present invention relates to the combination, with the call-bells, of swinging supports that allow the bells to be 2 5 separatedfrom the hammer, so that the hammer mayvibrate freely without-striking the bells. This allows the instrument to remain unaltered in its operative parts, and the bells to be silenced whenever considered advisable.

0 In the drawings, Figure 1 is an elevation of ,a telephone call-box with my improvements added thereto, one ofthe bells being in sec- "tion. Fig. 2 is a vertical section at the line a: 00. Fig. 3 is a sectional plan at the line y,

5 and Fig. 4; represents the call-drop as hanging down.

The telephone call-box A, bells B B, and hammer G are of ordinary character, except as hereinafterdescribed, and hence the same do not require further explanation.

hen a call is sent out by turning the crank c, orwhen a call is received, the hammer O is vibrated between the bells B B and strikes them rapidly. The sound made is unnecessary where an attendant is at the instrume-nt, because the vibrations of the hammer can be observed by the eye, and indicate the sending out or the answering of a call. To prevent the bells ringing, I mount each bell upon a stud, h, that is movable, so that the bells can be pushed apart to move them out of reach of the hammer. I prefer to place each stud h on a link, In, that is attached bya screw,

Z, and it swings between two limited stops, 1 and 0, so thatwhen swung into the position shown by full lines the bells are within reach of the hammer 0, but when swung over to the position of the dotted lines the bells are out of reach of the hammer. These movements can hammer G is upon a handle or stem extending to the armature of an electro-magnet, so that the hammer is operated by said armature. I Y provide an indicator, preferably in the form of a small flap, s, that is hinged at the bottom, and there is a lever, t, pivoted at 4, and pro vided at one end with a notch to receive the 7 stem of the hammer or other connection to the armature, so that when the armature is vibrated the lever will be moved. There is a latch, 5, at the end of this lever, and it holds up the flap s by passing through a slot, as shown, or by catching over a projection, hence when the lever is vibrated the flap s will be liberated, and will an and indicate that there has been a call on the telephone. I prefer to place on the backof the flap s, or on 8 5 the surface of the box A, the word Call, or some equivalent word, which is out of sight when the flap is turned up, but which isexhibited when the flap falls.

I employ a spring to throw down the flap. 0 A rubber band, 11, is preferable, as it can be passed over the flap and rest upon a ledge, 7, and be passed below the stud or pin 8, so as to draw the flap down the instantthe same is liberated by the movement of the latch.

I claim as my invention- 1. In a telephone call-box, the combination, with the two bells and the vibrating hammer between them, of movable studs for supporting such bells and allowing them to be sepa- 10o rated, substantially as set forth.

. 2. The combination, with the bells in a telephone call box, of movable studs supporting the bells, links for such studs, and stops to limit the movements, so that the bells can be removed from the hammer or the reverse,

substantially as set forth.

3. The combination, Withthe magnets, hammer, and bells in a telephone call-box, of an indicator hinged to the box, and a lever pivoted" at 4, and having a latch at one end, and conneoted at the other end with the hammer for moving the latch, substantially as set forth.

4. The combination, With the hammer in a telephone call-box, of .a latch-lever moved by the hammer, an indicator held up by the Witnesses:

-OHARLES W. RUNYoN,

MARY M. LANE. 

